package com.itbaizhan;
import java.lang.instrument.Instrumentation;

public class PreMainTraceAgent {

    public static void main(String[] args) {

    }

    public static void premain(String agentars, Instrumentation instrumentation) {
        System.out.println("============= premain执行了 =============");
        instrumentation.addTransformer(new TestTransformer());
    }




}
